For me I focus on this the 3 Temperature, ph, salinity. I'll leave the bag in the tank with the light off for an hour. Then I will pour the fish into a container and drip about 1 drop per 2 second using a valve. I will check the ph and salinity of the bucket and if it is the same as my tank I will release the fish in. Survival rate has been good except for the jawfish which jumped out on me.